Lakes / New York / Washington County

Lakes in Washington County, New York

27 lakes counted in Washington County - the largest is Lake Champlain at 277,117 acres.

Lakes Counted

277,117 acres

Largest - Lake Champlain

25 ft

Deepest - Cossayuna Lake

Washington County, highlighted, with its largest counted lakes dotted. Outlines from Census boundary data.

All Counted Lakes

#	Lake	County	Surface Area	Max Depth
1	Lake Champlain	Washington	277,117 acres	-
2	South Bay	Washington	1,238 acres	-
3	Cossayuna Lake	Washington	661 acres	25 ft
4	Hadlock Pond	Washington	218 acres	-
5	Lake Nebo	Washington	124 acres	-
6	Crossett Pond	Washington	122 acres	-
7	Hedges Lake	Washington	117 acres	-
8	Summit Lake	Washington	84 acres	-
9	Lake Lauderdale	Washington	78 acres	-
10	Mill Bay	Washington	74 acres	-
11	Lakes Pond	Washington	74 acres	-
12	Pine Lake	Washington	73 acres	-
13	Copeland Pond	Washington	58 acres	-
14	Mud Pond	Washington	58 acres	-
15	Barkley Pond	Washington	56 acres	-
16	Lake Champlain	Washington	56 acres	-
17	Martins Pond	Washington	52 acres	-
18	Billings Marsh	Washington	51 acres	-
19	Browns Pond	Washington	44 acres	-
20	Dolph Pond	Washington	44 acres	-
21	Smith Pond	Washington	43 acres	-
22	Sly Pond	Washington	42 acres	-
23	Fishbrook Pond	Washington	40 acres	-
24	Irwin Road Pond	Washington	31 acres	-
25	Scott Lake	Washington	30 acres	-
26	Thurber Pond	Washington	28 acres	-
27	McDougall Lake	Washington	27 acres	-

Sources: New York State DEC lake data; USGS. Verified October 30, 2026.